At the aviation intermediate (AVIM) direct support level of
maintenance, you will be expected to troubleshoot the R-1496 radio receiver
component of the AN/ARN-89 down to a faulty subassembly. Once you find the
defective subassembly, you will replace it with a known good one. You will
then send the faulty subassembly to a higher level of maintenance to be
Since the R-1496 is the only radio we will be using in this task,
hereafter we will refer to the R-1496/ARN-89 as simply radio.